After taking the drug heart rate is normal is not recommended to go to the plateau work, so as not to cause adverse reactions. 1. heart rate is too fast: heart rate is too fast after taking the drug is normal, is not recommended to go to the plateau work, due to the plateau area of low oxygen content, the heart in order to prevent the body from lack of oxygen, will accelerate its heart rate to compensate for the oxygen-poor environment, so that the heart rate is faster, the heart can not withstand high pressure difference, will cause the body to feel uncomfortable. 2. Heart rate is too slow: heart rate is too slow after taking medication is normal, slow heart rate indicates that the heart itself ejects less blood, organs and tissues there is a lack of supply and demand, the plateau area has a lower oxygen content, will lead to hypoxia, triggering the occurrence of heart disease. If you need to work on the plateau, you should go to the hospital for a physical examination, and the results of the examination are normal before deciding whether or not you can work on the plateau, and if you have any symptoms of physical discomfort, you should go to the hospital in a timely manner and consult a physician for guidance.